:root {
    --bg-main: #07080c;
    --bg-card: #0f1118;
    --bg-card-hover: #161922;
    --bg-input: #0b0d13;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: #6366f1;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: rgba(99, 102, 241, 0.15);
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Fira Code', monospace;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.7);
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.55;
    min-height: 100vh;
    width: 100%;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.15s ease;
}

img, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.025em;
    overflow-wrap: anywhere;
}

.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-muted { color: var(--text-muted); }
.text-dim { color: var(--text-dim); }
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.font-mono { font-family: var(--font-mono); }
.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 0.92rem;
    min-height: 42px;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.1s ease, border-color 0.15s ease, box-shadow 0.15s ease;
    text-decoration: none;
    line-height: 1.2;
    user-select: none;
    touch-action: manipulation;
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: var(--primary);
    color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.35);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color);
    color: var(--text-main);
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.12);
    border-color: rgba(239, 68, 68, 0.25);
    color: #f87171;
}

.btn-danger:hover:not(:disabled) {
    background: var(--danger);
    color: #ffffff;
    border-color: var(--danger);
}

.btn-sm {
    min-height: 36px;
    padding: 0.4rem 0.85rem;
    font-size: 0.82rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    min-height: 50px;
    padding: 0.85rem 1.75rem;
    font-size: 1.05rem;
    border-radius: var(--radius-lg);
}

.btn-block {
    width: 100%;
}

.form-group {
    margin-bottom: 1.25rem;
    text-align: left;
    width: 100%;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.45rem;
    color: var(--text-main);
}

.form-control {
    width: 100%;
    min-height: 44px;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-main);
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
}

textarea.form-control {
    resize: vertical;
    min-height: 90px;
    line-height: 1.5;
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-dim);
    margin-top: 0.35rem;
}

.input-group {
    display: flex;
    align-items: stretch;
    width: 100%;
}

.input-prefix {
    display: flex;
    align-items: center;
    padding: 0 0.85rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-right: none;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    color: var(--text-dim);
    font-size: 0.88rem;
    white-space: nowrap;
    user-select: none;
}

.input-group .form-control {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    width: 100%;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
}

.alert {
    padding: 0.85rem 1.15rem;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    line-height: 1.4;
    word-break: break-word;
}

.alert-success {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #34d399;
}

.alert-error, .alert-danger {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
}

.modal-backdrop {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: min(480px, calc(100vw - 2rem));
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.15rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    min-width: 36px;
    min-height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.modal-close:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.05);
}

.modal-body {
    padding: 1.25rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: rgba(0, 0, 0, 0.25);
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.profile-loader {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    background: #07080c;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.35s ease, visibility 0.35s ease;
}

.profile-loader.fade-out {
    opacity: 0;
    visibility: hidden;
}

.loader-spinner {
    width: 42px;
    height: 42px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.profile-wrapper {
    min-height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(1.5rem, 4vw, 3rem) clamp(0.75rem, 3vw, 1.5rem);
}

.profile-anim-fade .profile-card,
.profile-anim-fade .template-minimal-container,
.profile-anim-fade .glass-card-main,
.profile-anim-fade .obsidian-box,
.profile-anim-fade .neon-card,
.profile-anim-fade .clean-box,
.profile-anim-fade .classic-content {
    animation: fadeIn 0.45s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.empty-state {
    text-align: center;
    padding: clamp(2rem, 5vw, 3.5rem) 1rem;
    width: 100%;
}

.empty-state-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem auto;
    color: var(--text-dim);
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
}

.empty-state-title {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--text-main);
}

.empty-state-text {
    font-size: 0.88rem;
    color: var(--text-muted);
    max-width: 360px;
    margin: 0 auto;
}

@media (max-width: 480px) {
    .card {
        padding: 1.25rem 1rem;
    }
    .modal-card {
        margin: 0 0.5rem;
    }
    .btn-lg {
        min-height: 44px;
        padding: 0.75rem 1.25rem;
        font-size: 0.95rem;
    }
}

*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}

.vip-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: linear-gradient(135deg, #eab308, #f59e0b);
    color: #0b0c10;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 9999px;
    box-shadow: 0 0 12px rgba(234, 179, 8, 0.35);
    letter-spacing: 0.02em;
}

.gateway-option {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    padding: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

.gateway-option:hover {
    border-color: rgba(99, 102, 241, 0.5);
    background: rgba(99, 102, 241, 0.05);
}

.gateway-option input[type="radio"]:checked + .gateway-card-inner {
    border-color: #6366f1;
}

.vip-plan-card {
    background: rgba(18, 20, 29, 0.85);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 2rem;
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.vip-plan-card:hover {
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.4);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.vip-plan-card.featured {
    border-color: rgba(99, 102, 241, 0.6);
    box-shadow: 0 0 25px rgba(99, 102, 241, 0.2);
}